points
12
0 0 0
0 3 0
0.0 0.5 0
0.5 0.0 0
1.0 0.0 0
1.5 0.5 0
1.5 3.0 0

1.5 0.5 0
2.0 0.0 0
2.5 0.0 0
3.0 0.5 0
3.0 3.0 0
end points
lines
9
0 1
2 3
3 4
4 5
5 6
7 8
8 9
9 10
10 11
end lines